Let's roll up our sleeves and solve this. We have 234 and we're going to multiply it by 4, essentially adding 234 to itself 4 times.
Step 1: 0 + 234 = 234
Step 2: 234 + 234 = 468
Step 3: 468 + 234 = 702
Step 4: 702 + 234 = 936

So, 234*4 = 936